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PAGE 28 — MVH508DZ PLATE COMPACTOR • OPERATION AND PARTS MANUAL — REV. #0 (04/04/14)
HYDRAULIC OIL
1. With the handle in vertical position, remove the plug
cap from the hydraulic pump (Figure 25).
Figure 25. Removing Plug/Breather Cap
2. Remove the breather plug with a 24 mm wrench at the
top of the hydraulic pump.
3. Remove the hydraulic hose connected to the cylinder
on the vibrator side (Figure 26).
Figure 26. Removing Hydraulic Hose
4. Set the run lever to reverse.
5. Drain the hydraulic oil from the pump.
6. After the oil is drained, attach the hydraulic hose again
to the cylinder on the vibrator side.
Breather
plug
Plug cap
OIL LEVEL
Hydraulic
pump
Air releasing plug
Cylinder
Hydraulic hose
MAINTENANCE
7. With the direction control lever at the forward-most
position, secure the guard frame with a rope to
immobilize (Figure 27).
Figure 27. Direction Control Lever
(Forward Position)
8. Pour hydraulic oil (550cc) to the hydraulic pump
breather plug attachment hole (Figure 25).
9. Remove the air releasing plug of vibrator cylinder. Oil
will then come out from the air releasing plug. After air
bubbles stop coming out, reattach the plug. Tighten
securely (Figure 26).
10. Release the direction control lever and move the lever
forward and reverse several times (until no air bubbles
are seen). Keep the lever at the forward position for
10 seconds every time. (Because the check valve is
opened at the maximum forward position and air bubble
will come out from the oil tank of the hydraulic pump).
11. In case the air bleeding is insufficient, repeat steps 9
and 10.
12. Attach the hydraulic pump breather plug and put on
the plug cap. After making sure the hydraulic oil in the
pump is at OIL LEVEL, attach the breather plug.
Direction
control lever
Guard frame
Forward-most position
CAUTION
DO NOT exceed OIL LEVEL of hydraulic oil. If the level
is higher, oil will burst out from the breather plug.